Answer:
.03483 moles
Explanation:
.45 * 77.4/1000 =
Which of the following is a structure of a cow?
O Possessing sharp teeth.
O Having hooved feet.
O Coming when called.
O None of the above.
Answer:
None of the above.
Explanation:
None of thesse things are part of the structure of a cow, cows have dished forhead 4 stomachs and angular body not sharp teeth comin when called or hooved feet.
A car is accelerating from rest at a rate of 2 (m/s)/ s. How fast will it be going after 4 seconds?
Answer:
8 m/s
Explanation:
The Formula
v = u + at⇒ v = final velocity
⇒ u = initial velocity
⇒ a = acceleration
⇒ t = time taken
Given
u = 0 [rest]a = 2 m/st = 4 sSolving
v = u + atv = 0 + 2(4)v = 8 m/sIs iron conducting electricity a physical, or chemical change?
Answer:
Its a chemical conducting electricity
Describe what happens to the light ray when it travels through air then into water
Answer:
when light travels into the water from the air, it slows down (because water is a more dense substance) which causes it to change direction and makes it seem to bend. this is called refraction. mediums that are more dense have a higher refraction index. for example, air has a ri of 1, but water is about 1.33.
How may using sorbents to clean an oil spill be helpful to the ecosystem?
Answer:
Are sorbents good for the environment?
Natural Inorganic Sorbents
Second, sorbents that sink should not be used as they could be harmful to the environment. Sinking is a problem with many sorbents, such as untreated peat moss, most inorganic sorbents, and many wood products.
Its major result is to clean out some surface contaminants, which makes it simpler for oil to absorb. On the other hand, pyrolysis, a high-temperature thermal treatment, causes the sorbent to carbonise. In turn, this greatly improves the oil sorption capacity and oil to water selectivity.
What are the advantages of using sorbents?When recovering adsorbent materials that cause secondary contamination, lighter, less viscous oil is lost through the pores more readily than heavier, more viscous oils. Application is simple because sorbents can be applied automatically or manually to spills using blowers or fans.
The best sorbents for recovering oil are typically synthetic ones. In some circumstances, a weight ratio of 40:1 for oil to sorbent can be reached, as opposed to 10:1 for organic compounds and only 2:1 for inorganic materials.
A substance used to absorb or adsorb liquids or gases is known as a sorbent. Examples comprise: a substance that works via adsorption and is comparable to molecular sieve material (attracting molecules to its surface). It has strong thermal conductivity and a big interior surface area.
Thus, On the other hand, pyrolysis, a high-temperature thermal treatment, causes the sorbent to carbonise.
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Scientists who study objects in space (astronomers) often scan the sky using devices called radio telescopes. What can you conclude about these devices?
Question 10 options:
They send radio broadcasts out to distant stars and planets.
They pick up the radio waves emitted by stars, galaxies, and other objects in space..
They are less powerful than optical telescopes (telescopes that use visible light).
They can detect unltraviolet radiation
(40) If a hypothesis is proven correct, a theory is formulated.
True or false
Answer: False, I believe.
Explanation: If a Hypothesis is proven correct, then another experiment to strengthen that Hypothesis is should be done.
What would be the mass of 9.76 x 1022 formula units of SrCla?
Answer:
25.7 g
Explanation:
I don't know what to put here hahaha, I hope my answer helps you ^^
What is a technique for gene therapy?
Answer:
For gene therapy, stem cells can be trained in a lab to become cells that can help fight disease. Liposomes. These fatty particles have the ability to carry the new, therapeutic genes to the target cells and pass the genes into your cells' DNA.
Mark me as brainlest please!
What are the five major lines of latitude?
Answer: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle. Hope this helps.
Hi can someone please help me find the average for these temperatures? I need them asap
Answer:
55 degrees F - cold water
120 degrees F
the last on I don't know
What best describes these three molecules? they are not isomers. they are structural isomers. they are geometric isomers. they are both structural and geometric isomers.
Answer:
B
Explanation:
Answer:
The correct answer is B.
They are structual isomers.
Mass number is the number of?
Answer:
mass is the amount of matter in an object
Explanation:
PLEASE HELP!!!!
What are examples of pollution that can result from mining operations?
Answer:
Acid mine drainage
metal contamination,
increased sediment levels in streams
Explanation:
ACID MINE DRAINAGE
Mine waste, heavy metals and acidic water often end up in streams and rivers.
METAL CONTAMINATION
Heavy metals also affect the biodegradability of organic pollutants, making them less degradable and thus causing double the effect of polluting the environment.
Answer: salt and petroleum
Explanation:
Just took this today and im pretty sure this is the right one
Please help !!!!! I need this for Chemistry class
Answer: Silver has the highest temp. change and water has the lowest temp. change.
Explanation:
According to the specific heat capacity, water has lowest specific heat and greatest is that of silver owing to their temperature differences.
What is specific heat capacity?
Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.It is different for different substances.
It is given by the formula ,
Q=mcΔT
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giving brainliest please help!
Answer:
pretty sure it is
2
1
2
3
1
2
Explanation:
In a redox reaction, which ion would you expect to be more easily reduced?.
A chemist dilutes a 1.0 ml sample of 2.0 m kno3 by adding water to it. if the concentration of the solution that is obtained is 0.0080 m, what is its volume? use m subscript i v subscript i equals m subscript f v subscript f.. 125 ml 250 ml 500 ml 2,000 ml
A chemist dilutes a 1.0 ml sample of 2.0M KNO₃ by adding water to it. If the concentration of the solution that is obtained is 0.0080 m, then its volume is 250mL.
How do we calculate volume?Volume for the given equation will be calculated by using the below equation as:
M₁V₁ = M₂V₂, where
M₁ = molarity of KNO₃ = 2M
V₁ = volume of KNO₃ = 1mL
M₂ = molarity of final solution = 0.0080M
V₂ = volume of final solution = ?
On putting these values on the above equation, we get
V₂ = (2)(1) / (0.0080) = 250mL
Hence option (2) is correct.
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Answer:
B. 250 mL
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
What is the mode of action of sulfonamides?
inhibition of protein synthesis
inhibition of cell wall synthesis
disruption of folic acid synthesis
disruption of membrane structure
Answer:
b is the correct answer inhibition of cell wall
Hey there!
Sulfanilamide is the classification of the antibiotics that can target the bacteria that’s causing infections.
But the action of the mode of sulfanilamide is: binding of a specific enzyme which simply translates to inhibition of the cell wall
Thus, your answer is: inhibition of cell wall synthesis (Option B.)
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
Automobile catalytic Converters use a platinum callus to reduce air pollution by changing emissions such as carbon monoxide CO2 to carbon dioxide CO2 the uncatalyzed reaction is represented by the balance inflation below 2 CO + 02 2CO2 + heat determine the number of moles of O2 reaction with 28 moles of CO during this reaction
Answer:
14 mol O₂
Explanation:
The reaction between CO and O₂ is the following:
CO + O₂ → CO₂
We balance the equation with a coefficient 2 in CO and CO₂ to obtain the same number of O atoms:
2CO + O₂ → 2CO₂
As we can see from the balanced equation, 1 mol of O₂ is required to react with 2 moles of CO. Thus, the conversion factor is 1 mol of O₂/2 mol CO. We multiply the moles of CO by the conversion factor to calculate the moles of O₂ that are required:
28 mol CO x 1 mol of O₂/2 mol CO = 14 mol O₂
what are difference between graphite and diamond
Answer:
[tex]Diffrence \: between \: graphite \: and \: diamond [/tex]
[tex]\qquad \huge{\sf{point \: 1}} ➫[/tex]
⇛Graphite is soft in nature
⇛Diamond is hardest substance
[tex]\qquad \huge{\sf{point \: 2}} ➫[/tex]
⇛Graphite is a good conductor
⇛Diamond is not a conductor
[tex]\qquad \huge{\sf{point \: 3}} ➫[/tex]
⇛Graphite is grey in colour
⇛Diamond have transperant look
[tex]\qquad \huge{\sf{point \: 4}} ➫[/tex]
⇛Graphite have SP² hybridization
⇛Diamond have SP³ hybridization
[tex]\qquad \huge{\sf{point \: 5}} ➫[/tex]
⇛Graphite have layered structure
⇛Diamond have crystalline structure
10. How many molecules are contained in 5.6 L of H2 at STP?
Answer:
1 mole of any material contains 6.023×1023 elementary particles. Hence, by ratio and proportion, 5.61mol of diatomic hydrogen gas contains 5.61×6.023×1023 hydrogen molecules =3.3789×1024 H2 molecules.
Explanation:
What do the following organic chemicals have in common glyphosphate, lindane, 2,4-d, chlordane
Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common.
What is Organic compound?Organic compound are group of chemical substance that have carbon and hydrogen atoms in which the bonds are covalently linked together.
Therefore, Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common and these chemicals are use as herbicides that is kill weeds, or to kill insects or pests because of chlorine present in it.
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Which is the goal of technology?
to expand comprehension
to make life easier
to apply knowledge
to improve communication
Answer:
B. To make life easier.
Explanation:
Although all of the above makes sense, the answer should be B. because it is to help improve how we live.
I hope it helps! Have a great day!
Muffin~
The goal of technology is to make life easier.
What is goal?A goal is "an idea of the future or desired result that a person or a group of people envision, plan and commit to achieve".
What is technology?
Technology is "the use of scientific knowledge for practical purposes or applications, whether in industry or in our everyday lives".
Hence, the goal of technology is to make our life better.
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giving brainliest please help!
Answer:
the reaction will shift right towards products
Explanation:
A liquid has an empirical formula CCl2, and a boiling point of 1 21 oC. When vapourised, the gaseous compound has a density of 4.93 g/L at 785torr and 1 50oC. What is the molar mass of the compound and what is its molecular weight?
Based on the data given, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu
How can molar mass of a gas be obtained from density, temperature and pressure?The molar mass of a gas can be obtained from density, temperature and pressure using the formula below:
molar mass = density × molar gas constant × temperature/pressureMolar gas constant, R = R = 0.082 L.atm/mol/K.
Temperature = 150 °C = 423 K
Pressure = 785 torr = 1.033 atm
density = 4.93 g/L
molar mass of gas = 4.93 × 0.082 × 423/1.033
molar mass of gas = 165.5 g/mol
Then, molecular weight of the gas = 165.5 amu
Therefore, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu
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polease help 20pts
chemistry redox
Answer:
A is mg because it is losing 2 electrons
B is N2
C Mg as oxidation is lose of electrons
D is N2 as reduction is gain of electrons
Explanation:
you can easily remember as OIL RIG in term of electrons as Oxidation is Lost of electrons. Reduction is Gain of electrons.
The exploration of the mid-cayman rise is intended to discover _______. a. what life may have been like before the evolution of photosynthesis b. the origins of photosynthesis c. life in shallow, coastal regions d. the chemical composition of undersea mountains
The exploration of the mid-cayman rise is intended to discover that what life may have been like before the evolution of photosynthesis.
What is mid - cayman rise?Mid - cayman rise is an area or era where only some amount of light is coming but still existence of life is present there.
As we know that plants make their own food by the process called photosynthesis in the presence of light, but this is not the scenario for all the time. Before the discovery of photosynthesis plants also prepared their own food.
Hence, option (a) is correct.
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Answer:
A
Explanation:
To what volume should 0.0667 mol of KCl be diluted in order to prepare a 0.250 M solution?
To prepare 0.250 M solution, the 0.0667 mol of KCl should be diluted up to 266.8mL
StoichiometryFrom the question,
We are to determine to what volume the KCl should be diluted, in order to prepare 0.250 M solution
From the formula,
Numer of moles = Concentration × Volume
Then, we can write that
[tex]Volume= \frac{Number\ of\ moles}{Concentration }[/tex]
From the given information,
Number of moles = 0.0667 mole
Concentration = 0.250 M
Then,
[tex]Volume = \frac{0.0667}{0.250}[/tex]
Volume = 0.2668 L
Volume = 266.8 mL
Hence, to prepare 0.250 M solution, the 0.0667 mol of KCl should be diluted up to 266.8mL
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How much heat is absorbed when 70 grams of
water is completely vaporized at its boiling
point?
Answer:
Thus, the joules of heat absorbed when 70.0 grams of water is completely vaporised at its boiling point are 158,200.
